title: Molecular analysis of the cDNA and genomic DNA encoding mouse RNA helicase A.
abstract: RNA helicase A is an enzyme that possesses both RNA and DNA helicase activities. In this report, we describe the isolation of a mouse cDNA encoding RNA helicase A. The deduced amino acid sequence derived from mouse RNA helicase A cDNA exhibits 87 and 47% identity to its human and Drosophila homologs, respectively. Using Southern blot analysis employing a mouse backcross panel, we have assigned the mouse RNA helicase A gene to chromosome 1, mapping near the D1Bir20 locus at MGD position 67. Northern blot and primer extension analyses indicate that, although its level is variable, RNA helicase A appears to be expressed from a single transcription start site in all tissues tested. Sequence analysis of the upstream genomic DNA revealed that the promoter region lacks a TATA box and contains two high-affinity sites for Sp1, one ISRE, a binding site for interferon regulatory factor, and three AP2-binding sites. These findings suggest that the transcriptional regulation of the RNA helicase A gene is complex.
authors.affiliation: Graduate Program in Molecular Biology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, New York 10021, USA.
authors.forename: C G
authors.initials: CG
authors.lastname: Lee
authors.forename: T
authors.initials: T
authors.lastname: Eki
authors.forename: K
authors.initials: K
authors.lastname: Okumura
authors.forename: V
authors.initials: V
authors.lastname: da Costa Soares
authors.forename: J
authors.initials: J
authors.lastname: Hurwitz
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D004247:DNA / Q000302:isolation & purification*; D018076:DNA, Complementary / Q000302:isolation & purification*; D005091:Exons; D007438:Introns; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D009928:Organ Specificity / Q000235:genetics; D020365:RNA Helicases; D012316:RNA Nucleotidyltransferases / Q000235:genetics* / Q000302:isolation & purification; D012333:RNA, Messenger / Q000032:analysis; D012045:Regulatory Sequences, Nucleic Acid; D017422:Sequence Analysis, DNA
chemical_list: D018076:DNA, Complementary; D012333:RNA, Messenger; D004247:DNA; D012316:RNA Nucleotidyltransferases; D020365:RNA Helicases